X0206 3 2021-03-01 1 0001819253 Haymaker Acquisition Corp. III HYACU 0001455717 Mayerson Frederic H 501 MADISON AVENUE, FLOOR 12 NEW YORK NY 10022 1 0 0 0 The reporting person has an indirect pecuniary interest in shares of Class B common stock of the Issuer through his membership interest in Haymaker Sponsor III LLC, over which the reporting person does not have voting or dispositive control. /s/ Frederic H. Mayerson 2021-03-01